Exhaust-nozzle



(No Model.)

J. H. EARL.

EXHAUST NOZZLE. No. 564,477. Patented July 21, 1896.

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w: nonms PETERS co. mam umol wA'snlNmoN n c UNITED STATES PATENT()EFIcE.

JOHN H. EARL, OF SOMERVILLE, MASSACHUSETTS.

EXHAUST-NOZZLE.

SPECIFICATION forming part of Letters Patent No. 564,477, dated July 21,1896.

Application filed October 22, 1895. Serial No. 566,515. (No model.)

To all whom it may concern.-

Be it known that I, JOHN H. EARL, a citizen of the United States,residing at Somerville, in the county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inExhaust-Nozzles, of which the following is a specification.

My invention relates to a new and useful improvement in exhaust-nozzlesfor locomotives and the like, and has for its object to produce such adevice that will be cheap in construction and effective in operation,and whereby the draft occasioned by the exhaust may be adjusted.

With these ends in view the invention consists in the details ofconstruction and combination of elements hereinafter set forth, and'thenspecifically designated by the claims.

In order that those skilled in the art to which my invention appertainsmay undera stand how to make and use the same, I will describe itsconstruction and operation in detail, referring by number to theaccompanying drawings, forming apart of this specification, and inwhich-- Figure 1 is a plan view of my improved nozzle, and Fig. 2 is asection thereof.

Similar letters denote like parts in the views of the drawings.

A is the exhaust-cap, formed by the wall B, which is of any desiredshape, and D are the bridges, which are wedge-shaped and extend radiallyinward from this wall to a center piece 0, which is preferablycone-shaped, the apex being at the bottom.

E is a screw-bolt threaded into this center piece, and F is a washerpassed over this bolt and resting upon the center piece and secured inplace by means of the nut G.

The washer F is of larger diameterthan the top of the center piece, andtherefore tends to reduce the clearance in the exhaust-chamher, so as tolimit the amount of steam that may pass through said chamber, so that toincrease or decrease this steam-space it is only necessary to replacethe washer F with a larger or smaller washer, as will be readilyunderstood.

As the amount of draft through the firebox of a locomotive is determinedby the clearance in the exhaust-nozzle, it will be seen that by the useof my improvement this draft may be increased or decreased, as thoughtbest, by simply replacing one washer F with another of a different size,the advantage of which will be readily understood by those skilled inthe art to which this invention appertains.

As the shape of the nozzle-wall and its mode of attachment isimmaterial, I have shown but one design of nozzle, but do not wish to belimited to this exact shape, as the gist of my invention rests in thebroad idea of interchangeable Washers, by means of which the draftcapacity of an exhaust-nozzle may be varied.

Having thus fully described my invention, what I claim as new and usefulis- 1. In a device of the character described, a removable disk orwasher F, secured to the base of an inverted cone 0, said cone beingsuspended in the middle of the exhaust-nozzle by radial arms D, whichare attached to the collar B, as and for the purpose described. 2. In adevice of the character described, a collar B, radial arms D, aninverted cone 0 at the intersection of the arms, a screw E on the baseof the cone and a disk or washer F, adapted to pass over the screw and abolt G, threaded to said screw, as and for the purpose described.

- In testimony whereof I have hereunto affixed my signature in thepresence of two subscribing witnesses.

JOHN EARL.

Witnesses 2 S. S. WILLIAMSON, HENRY J OHNSON. I

